<!DOCTYPE html>
<!--
Copyright (c) 2015 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<link rel="import" href="/tracing/base/base.html">

<script>
'use strict';

tr.exportTo('tr.ui.annotations', function() {
  /**
   * A base class for all annotation views.
   * @constructor
   */
  function AnnotationView(viewport, annotation) {
  }

  AnnotationView.prototype = {
    draw(ctx) {
      throw new Error('Not implemented');
    }
  };

  return {
    AnnotationView,
  };
});
</script>
